EP0487551B1 - Electromagnetic rotating actuator - Google Patents

Electromagnetic rotating actuator Download PDF

Info

Publication number
EP0487551B1
EP0487551B1 EP90911275A EP90911275A EP0487551B1 EP 0487551 B1 EP0487551 B1 EP 0487551B1 EP 90911275 A EP90911275 A EP 90911275A EP 90911275 A EP90911275 A EP 90911275A EP 0487551 B1 EP0487551 B1 EP 0487551B1
Authority
EP
European Patent Office
Prior art keywords
restoring element
rotary actuator
permanent magnet
actuator according
magnet segments
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90911275A
Other languages
German (de)
French (fr)
Other versions
EP0487551A1 (en
Inventor
Harald Kalippke
Friedrich Wendel
Erhard Renninger
Claus Kramer
Johannes Meiwes
Dieter Dick
Herbert Becker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0487551A1 publication Critical patent/EP0487551A1/en
Application granted granted Critical
Publication of EP0487551B1 publication Critical patent/EP0487551B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/14—Pivoting armatures
    • H01F7/145—Rotary electromagnets with variable gap
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/14—Pivoting armatures

Definitions

  • the invention is based on a turntable according to the preamble of claim 1.
  • a turntable with a magnetic return element which, in the event of a power failure of the servomotor, causes the armature of the turntable to a defined rest position transferred.
  • the known restoring element consists of two further permanent magnets connected to the armature.
  • the maximum torque of the restoring element counteracting the control torque is undesirably large.
  • the additional magnets also result in high costs.
  • the turntable according to the invention with the characterizing features of claim 1 has the advantage that the reset element has a much simpler structure, a more favorable torque characteristic and is cheaper to produce.
  • Another advantage is the simplification of assembly and the elimination of the need to set the emergency running point in the assembled state of the turntable.
  • the angular tolerances remain small enough even in large series production.
  • the torque curve can be easily optimized by varying the shape of the air gap, the angle of coverage with the permanent magnets and the thickness of the contour of the restoring element.
  • Figure 1 shows a longitudinal section through a turntable
  • Figure 2 shows a section through the turntable according to line II-II in Figure 1.
  • the rotary actuator 1 has a servomotor 2, the rotor of which acts on a throttle element 3 which is arranged in a bypass line 4 to an intake pipe 5 with a throttle valve for regulating the idle combustion air of an internal combustion engine.
  • the throttle element 3 is designed as a rotary slide valve, which more or less closes a control opening 6 in the bypass line 4.
  • the servomotor 2 consists of a central stator 7 with field windings 8 and a cup-shaped rotor 9 which has two preferably non-polar permanent magnet segments 10 which are arranged on its wall in the form of a cylinder jacket and lie opposite one another. These permanent magnet segments are bowl-shaped and cover an angular range of approximately 135 ° each.
  • the rotor 9 has a shaft 11 which is mounted in two bearings 13, 14 held in a housing 12 with low friction.
  • the throttle element 3 is mounted on the shaft 11 in a rotationally fixed manner.
  • the stator 7 is mounted on a housing cap 16, which covers the rotor 9 and the stator 7 and is connected to the housing 12.
  • the stator 7 carries on its axis 17 facing the housing 12 a restoring element 18 made of ferromagnetic material.
  • the reset element 18 is thus, like the stator 7, non-rotatable. It is designed as a thin disk and is located in the effective area of the permanent magnet segments 10 of the rotor 9.
  • the restoring element extends radially up to close to the permanent magnets 10 without touching them. In order to avoid edge effects, the permanent magnet segments 10 protrude beyond the restoring element 18 in the axial extent.
  • the restoring element can also be arranged on the end of the axis 17 facing away from the housing 12.
  • the restoring element 18 (see FIG. 2) consists of a central part 19, for example pressed onto the axis 17, with a central bore 20, which carries two opposite radial extensions 21 extending in the form of spokes. At the outer ends of the extensions 21 there are in each case two arms 22, 23, 24, 25 of equal length, which are directed laterally away and which extend approximately along a circular line forming the circumference of the restoring element 18. Two arms 22 and 25 or 24 and 23 together form magnetic poles 26 and 27 of the restoring element 18.
  • the magnetic field lines through the poles 26 and 27 and through the permanent magnet segments 10 are shown in broken lines in FIG.
  • the upper permanent magnet segment 10 forms a magnetic north pole on its inside facing the restoring element 18, the lower segment 10 a south pole.
  • a magnetic south pole is then formed at the pole 26 of the reset element 18 and a magnetic north pole is formed at the pole 27. Since each pole 26, 27 has two arms, two systems of closed magnetic field lines form at each pole. There is a distance of, for example, 45 ° between two arms 22, 25 and 23, 24, respectively, so that the free ends of the arms 22 to 25 do not touch.
  • the restoring element 18 has segments 28, 29 in the form of segments of a circle in the direction of the extensions 21.
  • the segments are approximately as wide as the circumferential gaps 30 of the same width, which are formed by the magnet segments 10, each of approximately 45 °.
  • the radial width of the arms 22 to 25 is small; it is preferably smaller than the thickness of the restoring element 18 measured in the direction of the axis 17.
  • the reset element 18 has the task of transferring the rotor and thus the throttle element 3 in the de-energized state of the servomotor 2 into a defined position, namely the idle idle position and holding it there, in order to open the emergency cross-section by means of the throttle element in the bypass line 4 ensure about the sufficient air can flow for the safe continued operation of the internal combustion engine.
  • a sufficient restoring torque must be available in every operating position of the throttle element 3.
  • the maximum of the restoring torque must not exceed the control torque of the servomotor.
  • the reset element 18 In the idle idle position of the rotor, the reset element 18 is in its magnetic latching point shown in FIG. 2.
  • the cutouts 28, 29 of the restoring element 18 lie exactly opposite the circumferential gaps 30 of the permanent magnet segments 10 at this latching point.
  • the torque curve of the restoring element 18 over the angle of rotation is flatter compared to a conventional turntable and steeper in the locking position, so that this remains limited to a narrow angular range of 2 ° to 3 °.
  • the latching of the cutouts 28, 29 on the gaps 30 of the permanent magnet segments 10 contributes significantly to the great accuracy with which the rest position is maintained, which is more precise than in the case of restoring elements without cutouts, whose uninterrupted poles snap onto the magnet center.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

The aim of the invention is to simplify a rotating actuator (1) with a magnetic reset element (18), in particular for controlling the cross-section of a choke, and to improve the torque profile of the reset element (18). To this end, the reset element (18) is made of ferromagnetic material and is arranged in the region of the permanent magnet segments (10) of the servomotor (2). The reset element (18) catches on the recesses (30) in the permanent magnets (10). This increases the precision with which the element (18) swings into its locking position. The rotating actuator (1) is particularly suitable as an idling rotating actuator in internal combustion engines.

Description

Die Erfindung geht aus von einem Drehsteller nach der Gattung des Anspruchs 1. Aus der JP-GM-OS 60-88044 ist bereits ein solcher Drehsteller mit einem magnetischen Rückstellelement bekannt, das bei Ausfall der Stromversorgung des Stellmotors den Anker des Drehstellers in eine definierte Ruhelage überführt. Das bekannte Rückstellelement besteht neben den gehäusefesten Permanentmagneten aus zwei weiteren, mit dem Anker verbundenen Permanentmagneten. Dies führt infolge des kleinen Drehmomentgradienten in der Ruhelage zu einer relativ geringen Rückstellkraft. Andererseits ist das dem Regeldrehmoment entgegenwirkende Maximaldrehmoment des Rückstellelements unerwünscht groß. Außerdem entstehen hohe Kosten durch die zusätzlichen Magnete.The invention is based on a turntable according to the preamble of claim 1. From JP-GM-OS 60-88044, such a turntable with a magnetic return element is already known which, in the event of a power failure of the servomotor, causes the armature of the turntable to a defined rest position transferred. In addition to the permanent magnets fixed to the housing, the known restoring element consists of two further permanent magnets connected to the armature. As a result of the small torque gradient in the rest position, this leads to a relatively low restoring force. On the other hand, the maximum torque of the restoring element counteracting the control torque is undesirably large. The additional magnets also result in high costs.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße Drehsteller mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß das Rückstellelement bei einem wesentlich vereinfachten Aufbau eine günstigere Drehmomentenkennlinie aufweist und preiswerter herstellbar ist.The turntable according to the invention with the characterizing features of claim 1 has the advantage that the reset element has a much simpler structure, a more favorable torque characteristic and is cheaper to produce.

Ein weiterer Vorteil ist in der Montageerleicherung und dem Wegfall einer Einstellung des Notlaufpunktes in montiertem Zustand des Drehstellers zu sehen. Darüberhinaus bleiben die Winkeltoleranzen auch bei Großserienfertigung klein genug. Weiterhin läßt sich durch Formvariation von Luftspalt, Überdeckungswinkel mit den Permanentmagneten und Dicke der Kontur des Rückstellelements der Drehmomentenverlauf leicht optimieren.Another advantage is the simplification of assembly and the elimination of the need to set the emergency running point in the assembled state of the turntable. In addition, the angular tolerances remain small enough even in large series production. Furthermore, the torque curve can be easily optimized by varying the shape of the air gap, the angle of coverage with the permanent magnets and the thickness of the contour of the restoring element.

Durch die in den Ansprüchen 2ff aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Anspruch 1 angegebenen Drehstellers möglich. Besonders vorteilhaft ist die Anpassung der Ausschnitte in den Polen des Rückstellelements an die Breite der Umfangslücken zwischen den Permanentmagnetsegmenten. Dadurch wird eine sehr genaue Einhaltung der Raststellung erreicht, in die sich das Rückstellelement in stromlosem Zustand des Stellmotors zurückdreht. Durch die Verwendung der Permanentmagneten des Antriebs auch für die Rückstelleinrichtung werden Teile gespart. Die scheibenförmige Bauform reduziert die axiale Baulänge der Rückstelleinrichtung. Durch die geringe radiale Breite der Arme des Rückstellelements wird die magnetische Remanenz gering gehalten und ein genaueres Einhalten der Raststellung erreicht.Advantageous further developments and improvements of the rotary actuator specified in claim 1 are possible through the measures listed in claims 2ff. The adaptation of the cutouts in the poles of the restoring element to the width of the circumferential gaps between the permanent magnet segments is particularly advantageous. As a result, the latching position, into which the restoring element rotates when the servomotor is de-energized, is maintained very precisely. By using the permanent magnets of the drive also for the reset device, parts are saved. The disc-shaped design reduces the axial length of the reset device. Due to the small radial width of the arms of the restoring element, the magnetic remanence is kept low and the latching position is more precisely maintained.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Figur 1 zeigt einen Längsschnitt durch einen Drehsteller, Figur 2 zeigt einen Schnitt durch den Drehsteller gemäß Linie II-II in Figur 1.An embodiment of the invention is shown in the drawing and explained in more detail in the following description. Figure 1 shows a longitudinal section through a turntable, Figure 2 shows a section through the turntable according to line II-II in Figure 1.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Der Drehsteller 1 hat einen Stellmotor 2, dessen Rotor auf ein Drosselorgan 3 wirkt, das in einer Bypassleitung 4 zu einem Ansaugrohr 5 mit Drosselklappe für die Regelung der Leerlaufverbrennungsluft einer Brennkraftmaschine angeordnet ist. Das Drosselorgan 3 ist als Drehschieber ausgebildet, der eine Steueröffnung 6 in der Bypassleitung 4 mehr oder weniger verschließt. Der Stellmotor 2 besteht aus einem zentralen Stator 7 mit Feldwicklungen 8 und einem becherförmigen Rotor 9, der zwei an seiner zylindermantelförmigen Wand angeordnete, einander gegenüberliegende vorzugsweise ungleichpolige Permanentmagnetsegmente 10 aufweist. Diese Permanentmagnetsegmente sind schalenförmig und bedecken einen Winkelbereich von je etwa 135°. Der Rotor 9 besitzt eine Welle 11, die in zwei in einem Gehäuse 12 gehaltenen Lagern 13, 14 reibungsarm gelagert ist. An der Welle 11 ist das Drosselorgan 3 drehfest angebracht.The rotary actuator 1 has a servomotor 2, the rotor of which acts on a throttle element 3 which is arranged in a bypass line 4 to an intake pipe 5 with a throttle valve for regulating the idle combustion air of an internal combustion engine. The throttle element 3 is designed as a rotary slide valve, which more or less closes a control opening 6 in the bypass line 4. The servomotor 2 consists of a central stator 7 with field windings 8 and a cup-shaped rotor 9 which has two preferably non-polar permanent magnet segments 10 which are arranged on its wall in the form of a cylinder jacket and lie opposite one another. These permanent magnet segments are bowl-shaped and cover an angular range of approximately 135 ° each. The rotor 9 has a shaft 11 which is mounted in two bearings 13, 14 held in a housing 12 with low friction. The throttle element 3 is mounted on the shaft 11 in a rotationally fixed manner.

Der Stator 7 ist an einer Gehäusekappe 16 montiert, die den Rotor 9 und den Stator 7 überdeckt und mit dem Gehäuse 12 verbunden ist. Der Stator 7 trägt auf seiner Achse 17 dem Gehäuse 12 zugewandt ein Rückstellelement 18 aus ferromagnetischem Werkstoff. Das Rückstellelement 18 ist somit, wie der Stator 7 undrehbar. Es ist als dünne Scheibe ausgebildet und befindet sich im Wirkungsbereich der Permanentmagnetsegmente 10 des Rotors 9. Das Rückstellelement erstreckt sich radial bis nahe an die Permanentmagnete 10, ohne diese zu berühren. Um Randeffekte zu vermeiden, überragen die Permanentmagnetsegmente 10 das Rückstellelement 18 in axialer Erstreckung. Das Rückstellelement kann auch auf dem dem Gehäuse 12 abgewandten Ende der Achse 17 angeordnet sein.The stator 7 is mounted on a housing cap 16, which covers the rotor 9 and the stator 7 and is connected to the housing 12. The stator 7 carries on its axis 17 facing the housing 12 a restoring element 18 made of ferromagnetic material. The reset element 18 is thus, like the stator 7, non-rotatable. It is designed as a thin disk and is located in the effective area of the permanent magnet segments 10 of the rotor 9. The restoring element extends radially up to close to the permanent magnets 10 without touching them. In order to avoid edge effects, the permanent magnet segments 10 protrude beyond the restoring element 18 in the axial extent. The restoring element can also be arranged on the end of the axis 17 facing away from the housing 12.

Das Rückstellelement 18 besteht (siehe Figur 2) aus einem auf die Achse 17 z.B. aufgepressten Mittelteil 19 mit zentraler Bohrung 20, das zwei gegenüberliegende speichenförmig sich erstreckende radiale Fortsätze 21 trägt. An den äußeren Enden der Fortsätze 21 sind radkranzförmig jeweils zwei seitlich weggerichtete gleichlange Arme 22, 23, 24, 25 angebracht, die sich etwa entlang einer den Umfang des Rückstellelements 18 bildenden Kreislinie erstrecken. Jeweils zwei Arme 22 und 25 bzw. 24 und 23 bilden zusammen magnetische Pole 26 und 27 des Rückstellelements 18.The restoring element 18 (see FIG. 2) consists of a central part 19, for example pressed onto the axis 17, with a central bore 20, which carries two opposite radial extensions 21 extending in the form of spokes. At the outer ends of the extensions 21 there are in each case two arms 22, 23, 24, 25 of equal length, which are directed laterally away and which extend approximately along a circular line forming the circumference of the restoring element 18. Two arms 22 and 25 or 24 and 23 together form magnetic poles 26 and 27 of the restoring element 18.

In Figur 2 sind gestrichelt die Mangnetfeldlinien durch die Pole 26 und 27 und durch die Permanentmagnetsegmente 10 eingezeichnet. Das obere Permanentmagnetsegment 10 bildet an seiner dem Rückstellelement 18 zugewandten Innenseite einen magnetischen Nordpol, das untere Segment 10 einen Südpol. Am Pol 26 des Rückstellelements 18 bildet sich dann ein magnetischer Südpol und am Pol 27 ein magnetischer Nordpol aus. Da jeder Pol 26, 27 zwei Arme aufweist, bilden sich zwei Systeme von geschlossenen Magnetfeldlinien an jedem Pol aus. Zwischen jeweils zwei Armen 22, 25 beziehungsweise 23, 24 besteht ein Abstand von beispielsweise 45°, so daß sich die freien Enden der Arme 22 bis 25 nicht berühren.The magnetic field lines through the poles 26 and 27 and through the permanent magnet segments 10 are shown in broken lines in FIG. The upper permanent magnet segment 10 forms a magnetic north pole on its inside facing the restoring element 18, the lower segment 10 a south pole. A magnetic south pole is then formed at the pole 26 of the reset element 18 and a magnetic north pole is formed at the pole 27. Since each pole 26, 27 has two arms, two systems of closed magnetic field lines form at each pole. There is a distance of, for example, 45 ° between two arms 22, 25 and 23, 24, respectively, so that the free ends of the arms 22 to 25 do not touch.

Zwischen den Polen 26, 27 hat das Rückstellelement 18 in Richtung der Fortsätze 21 kreissegmentförmige Ausschnitte 28, 29. Die Ausschnitte sind etwa so breit, wie die von den Magnetsegmenten 10 gebildeten gegenüberliegenden gleichbreiten Umfangslücken 30 von jeweils ca. 45°. Die radiale Breite der Arme 22 bis 25 ist gering; sie ist vorzugsweise kleiner als die in Richtung der Achse 17 gemessene Dicke des Rückstellelements 18.Between the poles 26, 27, the restoring element 18 has segments 28, 29 in the form of segments of a circle in the direction of the extensions 21. The segments are approximately as wide as the circumferential gaps 30 of the same width, which are formed by the magnet segments 10, each of approximately 45 °. The radial width of the arms 22 to 25 is small; it is preferably smaller than the thickness of the restoring element 18 measured in the direction of the axis 17.

Das Rückstellelement 18 hat die Aufgabe, den Rotor und damit das Drosselorgan 3 in stromlosem Zustand des Stellmotors 2 in eine definierte Lage, nämlich die Leerlauf-Ruhestellung zu überführen und dort zu halten, um mittels des Drosselorgans in der Bypassleitung 4 die Öffnung eines Notlaufquerschnittes zu gewährleisten, über den ausreichend Luft für den sicheren Weiterlauf der Brennkraftmaschine strömen kann. Dazu muß in jeder Betriebslage des Drosselorgans 3 ein ausreichendes Rückstelldrehmoment zur Verfügung stehen. Gleichzeitig darf das Maximum des Rückstelldrehmoments nicht das Regeldrehmoment des Stellmotors überschreiten.The reset element 18 has the task of transferring the rotor and thus the throttle element 3 in the de-energized state of the servomotor 2 into a defined position, namely the idle idle position and holding it there, in order to open the emergency cross-section by means of the throttle element in the bypass line 4 ensure about the sufficient air can flow for the safe continued operation of the internal combustion engine. For this purpose, a sufficient restoring torque must be available in every operating position of the throttle element 3. At the same time, the maximum of the restoring torque must not exceed the control torque of the servomotor.

In der Leerlauf-Ruhestellung des Rotors befindet sich das Rückstellelement 18 in seinem in Figur 2 gezeigten magnetischen Rastpunkt. In diesem Rastpunkt liegen die Ausschnitte 28, 29 des Rückstellelements 18 genau gegenüber den Umfangslücken 30 der Permanentmagnetsegmente 10.In the idle idle position of the rotor, the reset element 18 is in its magnetic latching point shown in FIG. 2. The cutouts 28, 29 of the restoring element 18 lie exactly opposite the circumferential gaps 30 of the permanent magnet segments 10 at this latching point.

Der Drehmomentenverlauf des Rückstellelements 18 über dem Drehwinkel ist gegenüber einem herkömmlichen Drehsteller im Maximum flacher und in der Raststellung steiler, sodaß diese auf einen engen Winkelbereich von 2° bis 3° begrenzt bleibt. Zu der großen Genauigkeit, mit der die Ruhestellung eingehalten wird, trägt maßgeblich die Rastung der Ausschnitte 28, 29 auf den Lücken 30 der Permanentmagnetsegmente 10 bei, die genauer ist als bei Rückstellelementen ohne Ausschnitte, deren ununterbrochene Pole auf Magnetmitte rasten.The torque curve of the restoring element 18 over the angle of rotation is flatter compared to a conventional turntable and steeper in the locking position, so that this remains limited to a narrow angular range of 2 ° to 3 °. The latching of the cutouts 28, 29 on the gaps 30 of the permanent magnet segments 10 contributes significantly to the great accuracy with which the rest position is maintained, which is more precise than in the case of restoring elements without cutouts, whose uninterrupted poles snap onto the magnet center.

Claims (8)

  1. Electromagnetic rotary actuator (1), particularly for controlling a throttle cross section in a line (4,5), carrying operating fluid, of an internal combustion engine, comprising an actuating motor (2) with a stator (7) which is fixed with respect to a housing, and a rotatable rotor (9), one of which exhibits oppositely located permanent magnet segments (10) arranged symmetrically with respect to the axis of rotation and the other one of which exhibits field windings (8) through which current flows, and with a magnetically acting contactless restoring element (18) which is located in the field of two oppositely polarised permanent magnets (10), characterised in that the restoring element (18) consists of a magnetisable material which is not permanently magnetic and has two poles (26, 27) which extend until they are close to the permanent magnet segments (10) and in that the poles (26, 27) are separated from one another by cutouts (28, 29) arranged on the circumference of the restoring element (18), which at least weaken its magnetic effect compared with the permanent magnet segments (10).
  2. Rotary actuator according to Claim 1, characterised in that the cutouts (28, 29) at the restoring element (18) are of approximately the same width as the circumferential gaps (30) formed between the permanent magnet segments (10).
  3. Rotary actuator according to Claim 1 or 2, characterised in that the restoring element (18) is located in the field of the permanent magnet segments (10) of the actuating motor (2), which have been extended for this purpose.
  4. Rotary actuator according to one of the preceding claims, characterised in that the restoring element (18) consists of a disc which is thin in the axial extent.
  5. Rotary actuator according to one of the preceding claims, characterised in that the restoring element (18), starting from its radial axis, in each case exhibits four arms (22 to 25) extending approximately along a circular line and two arms (22 and 25) and (23 and 24), respectively, in each case form a magnetic pole (26) and (27), respectively.
  6. Rotary actuator according to one of the preceding claims, characterised in that the arms (22 to 25) are constructed to be only thin in the radial extent.
  7. Rotary actuator according to one of the preceding claims, characterised in that the field windings (10) and the restoring element (18) are arranged at the stator (7) of the actuating motor (2).
  8. Rotary actuator according to one of the preceding claims, characterised in that the rotor (9) of the actuating motor (2) is constructed to be cup-shaped and encircling the stator (7) and the permanent magnet segments (10) are arranged on the cylindrical walls of the rotor (9).
EP90911275A 1989-08-16 1990-08-03 Electromagnetic rotating actuator Expired - Lifetime EP0487551B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3926909A DE3926909A1 (en) 1989-08-16 1989-08-16 ELECTROMAGNETIC TURNTABLE
DE3926909 1989-08-16

Publications (2)

Publication Number Publication Date
EP0487551A1 EP0487551A1 (en) 1992-06-03
EP0487551B1 true EP0487551B1 (en) 1993-11-24

Family

ID=6387149

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90911275A Expired - Lifetime EP0487551B1 (en) 1989-08-16 1990-08-03 Electromagnetic rotating actuator

Country Status (7)

Country Link
EP (1) EP0487551B1 (en)
JP (1) JPH04507328A (en)
KR (1) KR920704321A (en)
AU (1) AU6048190A (en)
BR (1) BR9007598A (en)
DE (2) DE3926909A1 (en)
WO (1) WO1991003063A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3234436A (en) * 1962-09-12 1966-02-08 Daco Instr Company Inc Rotary electromagnetic actuator
GB1237383A (en) * 1968-09-17 1971-06-30 Ferranti Ltd Improvements relating to rotary electromagnetic actuators
FR2209246B1 (en) * 1972-12-05 1978-03-03 Fresard Freres Sa
US4500861A (en) * 1983-02-17 1985-02-19 Nelson Victor H Sector motor having latching means for rotor in multiple positions

Also Published As

Publication number Publication date
KR920704321A (en) 1992-12-19
AU6048190A (en) 1991-04-03
JPH04507328A (en) 1992-12-17
EP0487551A1 (en) 1992-06-03
BR9007598A (en) 1992-06-30
DE59003633D1 (en) 1994-01-05
DE3926909A1 (en) 1991-02-21
WO1991003063A1 (en) 1991-03-07

Similar Documents

Publication Publication Date Title
EP0329950B1 (en) Hydraulic damper
DE102006000446B4 (en) Fluid pump and electric motor and their manufacturing process
WO2010086058A1 (en) Proportional magnet for a hydraulic directional control valve and method for the production thereof
DE102008037076A1 (en) Electromagnetic actuator of a hydraulic directional control valve
DE4038761A1 (en) TURNTABLE
EP2539553B1 (en) Camshaft phasing device
JPS57199207A (en) Driving device for rotation
WO1992001862A1 (en) Valve for the metered addition of volatilized fuel to the fuel/air mixture in an internal-combustion engine
DE3618982A1 (en) CONTROL DEVICE FOR A THROTTLE VALVE
DE3001473C2 (en)
EP0487552B1 (en) Electromagnetic rotating actuator
EP0487551B1 (en) Electromagnetic rotating actuator
DE3411456C2 (en)
EP0383065B1 (en) Valve for the intermittent introduction of fuel
DE4038760A1 (en) TURNTABLE
DE3506359A1 (en) Rotating drive device
DE3426996C2 (en)
EP0607378B1 (en) Actuator for adjusting the angle of rotation of a setting device
DE8901561U1 (en) Electrically operated rotary valve for a fuel supply device
EP0486508B1 (en) Electrical governor
DE102017101282A1 (en) ROTARY VALVE
DE3039521A1 (en) Motor vehicle IC engine idle run control - has throttle servomotor with rotor-facing pole shoes asymmetric w.r.t. rotor
DE3223557A1 (en) ELECTRIC ACTUATOR
DE4038762A1 (en) ACTUATOR
DE4019750A1 (en) EM rotary positioner esp. for CI engine throttle - incorporates radially resilient ring in internal opening of brushless motor with baseplate surrounding stator

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19920213

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT SE

17Q First examination report despatched

Effective date: 19930504

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19931124

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19931124

Ref country code: SE

Effective date: 19931124

Ref country code: GB

Effective date: 19931124

Ref country code: FR

Effective date: 19931124

REF Corresponds to:

Ref document number: 59003633

Country of ref document: DE

Date of ref document: 19940105

EN Fr: translation not filed
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19931124

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19950503